swagger-api/swagger-codegen

[ObjC] "Value transformer not found" error while passing complex request object

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#2,127 opened on Feb 12, 2016

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Client: ObjcIssue: Bughelp wanted

Description

I am creating a unit test case to test a API. I get the error below when I pass a more complex/nested object in the request while calling an API. Can you guide me what is wrong?

_failed: caught "Value transformer not found", "[JSONValueTransformer _JSONObjectFrom:] not found

Contributor guide

Tech stack
objective crest api
Domain
apimobile
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
needs investigation
Prerequisites
Objective C knowledgeJSON serialization concepts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
15
Research direction
Inspect the Objective C generator templates in the swagger codegen repository, specifically focusing on how JSONValueTransformer is implemented and applied to model classes. The error indicates a missing transformer for complex/nested objects. Look at the model's generated code to see if it conforms to the expected serialization protocol. Check if there is a need to register a custom transformer for nested models. Review the source files in modules/swagger codegen/src/main/resources/objc/ for any relevant code. Also examine the issue comments for any hints or similar problems.